Table 1.

Association of atopic sensitization, lung function, airway hyperresponsiveness, and FeNO with each wheezing phenotype

The number and direction of arrows (↑↓) represents the degree of the association of each outcome with each wheezing phenotype, a negative symbol (-) represents absence of association, and blank indicates not checked.

AHR, airway hyperresponsiveness; FeNO, fraction of exhaled nitric oxide; ALSPAC, Avon Longitudinal Study of Parents and Children; PIAMA, Prevention of Infant Asthma and Mite Allergy; SWS, Southampton Women's Survey.

^*Wheezing phenotypes in each birth cohort study.